【摘 要】
：
A calculation method based on a combination of △g parallelism rule,good matching site (GMS) analysis,CSL/DSCL (coincidence site lattice/displacement shift complete lattice) and the O-lattice theory has been applied to interpret the observation of the habi
【机 构】
：
Key Laboratory of Advanced Materials(MOE), School of Materials Science and Engineering, Tsinghua Uni
论文部分内容阅读
A calculation method based on a combination of △g parallelism rule,good matching site (GMS) analysis,CSL/DSCL (coincidence site lattice/displacement shift complete lattice) and the O-lattice theory has been applied to interpret the observation of the habit plane (HP) of the δ precipitates and the linear defects in the HP in an Inconel 718 superalloy.The small scattering in the HP orientation around an ideal rational plane is interpreted by the existence of a mixture of two types of steps with different heights and inclinations.These steps play a significant role to enhance the degree of matching in the HP.They are associated with secondary dislocations,with Burgers vectors of 1/6[1 1 (2)]γ/1/3[0 0 1]δ,and with a direction parallel to a near-invariant line along [1 (1) 0]γ.The spacing of the secondary dislocations projected on the terrace plane is around 6.3 nm.The calculated dislocation structure is in good agreement with the observation.
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